Sinoatrial exit block occurs when the action potential initiated by the sinoatrial node is inhibited or completely blocked before it is able to leave the SA node and reach the atrium, and thus no P ...

Normal cardiac function depends on the adequate timing of excitation and contraction in the various regions of the heart and on an appropriate pacemaker rate. This complex task is implemented by the ...

This page lists all known medications that could potentially lead to 'Sinoatrial node dysfunction' as a side effect. It's important to note that mild side effects are quite common with medications.

Your heart’s job is to keep your pulse steady to pump blood throughout your body. Sometimes your heart rate is slower when you’re relaxing, and sometimes it’s faster when you’re exercising or stressed ...

The SARS-CoV-2 virus can infect specialized pacemaker cells that maintain the heart's rhythmic beat, setting off a self-destruction process within the cells, according to a preclinical study. The ...

Sick sinus syndrome (SSS) is a heart rhythm problem that affects your heart's natural pacemaker. You may develop symptoms of SSS like dizziness, fainting, and fatigue. Treatment may include lifestyle ...